BUG: Reg Tuner: correct image plane directions.
ENH: Reg Tuner: scale image planes appropriately.
ENH: Reg Tuner: Apply Image Origin.
ENH: Add --scale flag to TubeTransform.

TODO: Add test.
ENH: Reg app: Print out center of rotation.
ENH: Add UltrasoundProbeGeometryCalculatorSerializer.
ENH: Reg: calculate ultrasound probe geometry.
ENH: Reg tuner: ultrasound probe origin sphere.
ENH: Add test for 3D UltrasoundProbeGeometryCalculator.

Fix bugs found in the process.

New test input image from "UltrasoundAugmentation/09-Dec-04/Stephen".
ENH: Add TubeAngleOfIncidenceWeightFunction.
ENH: Add AngleOfIncidenceWeightFunctionSerializer.
ENH: Reg Tuner: set initial camera center.
ENH: Reg app: Apply angle of incidence weights.

Only applied of parameters specified in JSON parameters file.
ENH: Reg app: Write tube point weights to output file.

If output file is given in JSON parameter configuration.
ENH: Remove duplicate points when sub-sampling tubes.
ENH: Reg tuner: color tube points by computed weights.
ENH: Reg: Make the MinimumScalingRadius a class parameter.
ENH: Remove unused class members.
ENH: Reg: Default MinimumScalingRadius 0.5 -> 0.1.
ENH: Reg app outputs transform instead of sampled image.

Change-Id: I21d6addca634b880fcf31b672331760ba5e8ae05